Post crash analysis

[ryguy76]

I lost power and my heli fell from the sky today. Once I got to the heli and removed the heli, I noticed that one of the ESC leads was now disconnected from the EC3 connector.

I was flying pretty aggressively so I’m guessing a high amp draw on my 3S Oxy setup was the likely cause as I also found I couldn’t disconnect the bullets as that side had leaked melted solder that fused the bullets together on that side thereby eliminating a cold solder diagnosis.

With the FBL losing power, I wondered if there was any way to get logs from Spirit as an indication of what might have happened. From what I can tell, once power I cut, that log is gone for good. Anyway around that being that I didn’t purposefully disconnect?


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[ZeXx86]

Hello,

please review the flight log - it is possible that the flight log is there.
If not, then the power was likely cut and it appeared as when main battery was disconnected.

You can perform BEC test that is integrated in the Diadnostic tab if the model is in condition to do so.
This could at leat exclude if this was caused due to BEC.

What servos and BEC you are running?

[ryguy76]

Hello,

please review the flight log - it is possible that the flight log is there.
If not, then the power was likely cut and it appeared as when main battery was disconnected.

You can perform BEC test that is integrated in the Diadnostic tab if the model is in condition to do so.
This could at leat exclude if this was caused due to BEC.

What servos and BEC you are running?

Hi,

I was expecting it to have been registered as a “major event” thereby being preserved, but I powered up the FBL last night and the log file was just showing that sessions log.

I don’t think it would be due to BEC as it desoldered at the main battery to ESC connection. Makes sense that the FBL wouldn’t know it was anything different than a normal power down.

I have KST 215’s/565x and using internal BEC of HW 60A v4.

I think my increased rpm and more aggressive flight style was drawing more amps than I have in the past and perhaps my solder joint wasn’t the best or had oxidized and created extra resistance creating additional heat.


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[urgno]

maybe moving to higher S to lower the current can be an idea

[ryguy76]

maybe moving to higher S to lower the current can be an idea

Higher S?? Pinion?


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[eg183100]

The EC3 plugs can handle only 30A Draw and peaks up to 60A. that is not much. that is why I always use 6mm Gold plugs for all my heels/planes (small size and big size)

[urgno]

maybe moving to higher S to lower the current can be an idea

Higher S?? Pinion?

maybe 3S -> 4S can be just pinion
for sure 3S -> 6S need a motor replacement

but you will lower a lot the Amps and the heli will be super bad ass